Changing Dimensions:

In addition to transpose operator, the MATLAB has some built-in functions which change the dimensions or configuration of matrices, involving fliplr, reshape, flipud, and rot90.

The function reshape changes the dimensions of a matrix. The matrix variable below mat is 3   4, or in another words it has 12 elements.

>> mat = randint(3,4,[1 100])

mat =

14 61  2 94

21 28 75 47

20 20 45 42

These 12 values rather than it could be arranged as a 2   6 matrix, 6   2, 4   3, 1 12, & 12   1. The function reshape iterates throughout the matrix column wise. For illustration, whenever reshaping mat into a 2   6 matrix, the value from the first column in the original matrix (14, 21, and 20) are used first, then the values from the second column (61, 28, 20), and so on.

>> reshape(mat,2,6)

ans =

14 20 28  2 45 47

21 61 20 75 94 42

Posted Date: 10/18/2012 4:30:35 AM | Location : United States

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